ICD-10 M17.12
Billable / SpecificUnilateral primary osteoarthritis, left knee
About ICD-10-CM M17.12
ICD-10-CM code M17.12 represents Unilateral primary osteoarthritis, left knee. This is a billable/specific code in the Musculoskeletal and Connective Tissue chapter (block M17). The 2026 edition of ICD-10-CM M17.12 became effective on October 1, 2025.
Medicare LCD Coverage for M17.12
Local Coverage Determinations (LCDs) from CMS MACs that list M17.12 as a covered diagnosis.
Showing top 10 of 496 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing M17.12.
1 Cigna
5 Medicare
CPT Codes Commonly Billed with M17.12
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
- 27447 Total knee arthroplasty — osteoarthritis Orthopaedic Surgery
- 20610 Joint injection major — knee OA, hip OA, shoulder OA, shoulder impingement, joint pain, meniscal derangement, synovitis, bursitis Orthopedics
- 27447 Total knee arthroplasty — primary knee OA unilateral/bilateral, post-traumatic OA, osteonecrosis Orthopedics
- 27446 Revision knee arthroplasty — failed TKA, mechanical loosening, component failure Orthopedics
- 73721 MRI knee without contrast — knee pain, meniscal derangement, meniscal tear, patellar tendinitis, knee OA, ACL injury Orthopedics
- J7322 CMS LCD: Billing and Coding: Intraarticular Knee Injections of Hyaluronan CMS LCD
- J7320 CMS LCD: Billing and Coding: Intraarticular Knee Injections of Hyaluronan CMS LCD
- J7327 CMS LCD: Billing and Coding: Intraarticular Knee Injections of Hyaluronan CMS LCD
- J7321 CMS LCD: Billing and Coding: Intraarticular Knee Injections of Hyaluronan CMS LCD
- J7326 CMS LCD: Billing and Coding: Intraarticular Knee Injections of Hyaluronan CMS LCD
Convert M17.12 to ICD-9-CM
Per CMS General Equivalence Mappings (GEMs), useful for legacy data review and historical claim analysis.
| ICD-10 | ICD-9 | Mapping Flags |
|---|---|---|
| M17.12 | 71516 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To M17.12
Other codes in section M15-M19 (Osteoarthritis).
ICD-10 M17.12, Billing FAQ
Is ICD-10 code M17.12 billable? +
Yes, M17.12 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What CPT codes are commonly billed with M17.12? +
Procedures frequently paired with M17.12 include: 27447, 20610, 27447, 27446, 73721.
What ICD-9 codes does M17.12 map to? +
Per CMS GEMs, M17.12 maps to ICD-9 codes: 71516. Useful for legacy data review and historical claim analysis.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on July 16, 2026.
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